* Copyright (c) 2012 The NetBSD Foundation, Inc.

/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Fleischer <[email protected]>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

/*
* All SD/MMC code is taken from various files in sys/dev/sdmmc
*/
/*
* Copyright (c) 2006 Uwe Stuehler <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

/*-
* Copyright (c) 2007-2010 NONAKA Kimihiro <[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <machine/limits.h>

#include <sys/param.h>
#include <sys/types.h>
#include <sys/disklabel.h>

#include <netinet/in.h>

#include <lib/libsa/stand.h>

#include <lib/libkern/libkern.h>
#include <lib/libsa/stand.h>
#include <lib/libsa/iodesc.h>

#include <dev/sdmmc/sdmmcreg.h>
#include "dev_sdmmc.h"
#include "s3csdi.h"

//#define SDMMC_DEBUG
#ifdef SDMMC_DEBUG
#define DPRINTF(s) do {printf s; } while (/*CONSTCOND*/0)
#else
#define DPRINTF(s) do {} while (/*CONSTCOND*/0)
#endif

/* SD/MMC device driver structure */
struct sdifdv {
char* name;
int (*match)(unsigned);
void* (*init)(unsigned, uint32_t*);
int (*host_ocr)(void*);
int (*bus_clock)(void*, int);
int (*bus_power)(void*, int);
int (*bus_width)(void*, int);
void (*exec_cmd)(void*, struct sdmmc_command*);
int (*get_max_bus_clock)(void*);
void* priv;
};

struct sdmmc_softc;

/* Structure used for of->f_devdata */
struct sdmmc_part {
struct sdmmc_softc *sc;
struct partition *part;
};

/* SD/MMC driver structure */
struct sdmmc_softc {
uint32_t flags;
uint32_t caps;
uint16_t rca; /* relative card address */
sdmmc_response raw_cid; /* temp. storage for decoding */
uint32_t raw_scr[2];
struct sdmmc_csd csd; /* decoded CSD value */
struct sdmmc_cid cid; /* decoded CID value */
struct sdmmc_scr scr;
int busclk;
struct sdifdv *sdifdv;
struct disklabel sc_label;
int npartitions;
struct sdmmc_part partitions[MAXPARTITIONS];
};

static struct sdifdv vnifdv[] = {
{"S3C SD/MMC", s3csd_match, s3csd_init, s3csd_host_ocr,
s3csd_bus_clock, s3csd_bus_power, s3csd_bus_width, s3csd_exec_cmd,
s3csd_get_max_bus_clock}
};
static int nnifdv = sizeof(vnifdv)/sizeof(vnifdv[0]);

static struct sdmmc_softc sdmmc_softc;
static uint8_t sdmmc_initialized = FALSE;

extern time_t getsecs();
extern time_t getusecs();
extern void usleep(int);

/* Local functions */
static int sdmmc_getdisklabel(struct sdmmc_softc *sc);
static int sdmmc_init(unsigned int tag);
static int sdmmc_enable(struct sdmmc_softc*);

static int sdmmc_mem_send_if_cond(struct sdmmc_softc*, uint32_t, uint32_t*);
static int sdmmc_mmc_command(struct sdmmc_softc*, struct sdmmc_command*);
static void sdmmc_go_idle_state(struct sdmmc_softc*);
static int sdmmc_mem_send_op_cond(struct sdmmc_softc*, uint32_t, uint32_t *);
static int sdmmc_set_bus_power(struct sdmmc_softc*, uint32_t, uint32_t);
static int sdmmc_app_command(struct sdmmc_softc*, uint16_t,
struct sdmmc_command*);
static int sdmmc_mmc_command(struct sdmmc_softc*, struct sdmmc_command*);
static int sdmmc_scan(struct sdmmc_softc*);
static void sdmmc_mem_scan(struct sdmmc_softc*);
static int sdmmc_set_relative_addr(struct sdmmc_softc*);
static int sdmmc_mem_send_cid(struct sdmmc_softc*, sdmmc_response*);

static int sdmmc_mem_send_csd(struct sdmmc_softc*, sdmmc_response*);
static int sdmmc_decode_csd(struct sdmmc_softc*, sdmmc_response);
static int sdmmc_decode_cid(struct sdmmc_softc*, sdmmc_response);

static int sdmmc_mem_read_block(struct sdmmc_softc*, uint32_t, u_char*, size_t);
static int sdmmc_select_card(struct sdmmc_softc*);
static int sdmmc_mem_set_blocklen(struct sdmmc_softc*);

static int sdmmc_mem_send_scr(struct sdmmc_softc*, uint32_t[2]);
static int sdmmc_mem_decode_scr(struct sdmmc_softc*);
static int sdmmc_set_bus_width(struct sdmmc_softc*, int);
static int sdmmc_mem_sd_switch(struct sdmmc_softc *, int, int, int, void*);

#ifdef SDMMC_DEBUG
static void sdmmc_dump_data(const char*, void*, size_t);
static void sdmmc_print_cid(struct sdmmc_cid*);
static void sdmmc_dump_command(struct sdmmc_softc*, struct sdmmc_command*);
#endif

int
sdmmc_open(struct open_file *of, ...)
{
va_list ap;
int unit __unused, part;

va_start(ap, of);
unit = va_arg(ap, u_int); /* Not used for now */
part = va_arg(ap, u_int);
va_end(ap);

/* Simply try to initialize SD mem sub system. */
if( !sdmmc_init(0) ) {
return 1;
}

of->f_devdata = (void*)&sdmmc_softc.partitions[part];

return 0;
}

int
sdmmc_close(struct open_file *f)
{
return (0);
}

int
sdmmc_get_fstype(void *p) {
struct sdmmc_part *part = (struct sdmmc_part*)p;

return part->part->p_fstype;
}

int
sdmmc_strategy(void *d, int f, daddr_t b, size_t s, void *buf, size_t *r)
{
struct sdmmc_part *part = (struct sdmmc_part*)d;
unsigned int offset;
switch(f) {
case F_READ:
offset = part->part->p_offset + b;
*r = s;
if(sdmmc_mem_read_block(part->sc, offset, buf, s) == 0)
return 0;
else
return EIO;
default:
printf("Unsupported operation\n");
break;
}
return (EIO);
}

int
sdmmc_getdisklabel(struct sdmmc_softc *sc)
{
char *msg;
int sector, i, n;
size_t rsize;
struct mbr_partition *dp, *bsdp;
struct disklabel *lp;
/*uint8_t *buf = wd->sc_buf;*/
uint8_t buf[DEV_BSIZE];

lp = &sc->sc_label;
memset(lp, 0, sizeof(struct disklabel));

sector = 0;
if (sdmmc_strategy(&sc->partitions[0], F_READ, MBR_BBSECTOR, DEV_BSIZE,
buf, &rsize))
return EOFFSET;

dp = (struct mbr_partition *)(buf + MBR_PART_OFFSET);
bsdp = NULL;
for (i = 0; i < MBR_PART_COUNT; i++, dp++) {
if (dp->mbrp_type == MBR_PTYPE_NETBSD) {
bsdp = dp;
break;
}
}
if (!bsdp) {
/* generate fake disklabel */
lp->d_secsize = DEV_BSIZE;
/*lp->d_ntracks = wd->sc_params.atap_heads;
lp->d_nsectors = wd->sc_params.atap_sectors;
lp->d_ncylinders = wd->sc_params.atap_cylinders;*/
lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
lp->d_type = DKTYPE_FLASH;
/*strncpy(lp->d_typename, (char *)wd->sc_params.atap_model, 16);*/
strncpy(lp->d_packname, "fictitious", 16);
/*if (wd->sc_capacity > UINT32_MAX)
lp->d_secperunit = UINT32_MAX;
else
lp->d_secperunit = wd->sc_capacity;*/
lp->d_rpm = 3600;
lp->d_interleave = 1;
lp->d_flags = 0;
lp->d_partitions[RAW_PART].p_offset = 0;
lp->d_partitions[RAW_PART].p_size =
lp->d_secperunit * (lp->d_secsize / DEV_BSIZE);
lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED;
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = dkcksum(lp);

dp = (struct mbr_partition *)(buf + MBR_PART_OFFSET);
n = 'e' - 'a';
for (i = 0; i < MBR_PART_COUNT; i++, dp++) {
if (dp->mbrp_type == MBR_PTYPE_UNUSED)
continue;
lp->d_partitions[n].p_offset = bswap32(dp->mbrp_start);
lp->d_partitions[n].p_size = bswap32(dp->mbrp_size);
switch (dp->mbrp_type) {
case MBR_PTYPE_FAT12:
case MBR_PTYPE_FAT16S:
case MBR_PTYPE_FAT16B:
case MBR_PTYPE_FAT32:
case MBR_PTYPE_FAT32L:
case MBR_PTYPE_FAT16L:
lp->d_partitions[n].p_fstype = FS_MSDOS;
break;
case MBR_PTYPE_LNXEXT2:
lp->d_partitions[n].p_fstype = FS_EX2FS;
break;
default:
lp->d_partitions[n].p_fstype = FS_OTHER;
break;
}
n += 1;
}
lp->d_npartitions = n;
}
else {
sector = bsdp->mbrp_start;
if (sdmmc_strategy(&sc->partitions[0], F_READ,
sector + LABELSECTOR, DEV_BSIZE,
buf, &rsize))
return EOFFSET;
msg = getdisklabel((char *)buf + LABELOFFSET, &sc->sc_label);
if (msg != NULL)
printf("getdisklabel: %s\n", msg);
}
/*DPRINTF(("label info: d_secsize %d, d_nsectors %d, d_ncylinders %d,"
"d_ntracks %d, d_secpercyl %d\n",
wd->sc_label.d_secsize,
wd->sc_label.d_nsectors,
wd->sc_label.d_ncylinders,
wd->sc_label.d_ntracks,
wd->sc_label.d_secpercyl));*/

return 0;
}

void
sdmmc_delay(int us) {
usleep(us);
}

/* Initialize the SD/MMC subsystem. Return 1 on success, and 0 on error.
In case of error, errno will be set to a sane value.
*/
int
sdmmc_init(unsigned int tag)
{
struct sdifdv *dv;
int n;
int error;
struct sdmmc_softc *sc = &sdmmc_softc;
char status[64];

if (sdmmc_initialized) {
printf("SD/MMC already initialized\n");
return 1;
}

for (n = 0; n < nnifdv; n++) {
dv = &vnifdv[n];
if ((*dv->match)(tag) > 0)
goto found;
}
errno = ENODEV;
return 0;
found:
sc->caps = 0;
/* Init should return NULL if no card is present. */
sc->sdifdv->priv = (*dv->init)(tag, &sc->caps);
if (sc->sdifdv->priv == NULL) {
/* We expect that the device initialization sets
errno properly */
return 0;
}

sc->flags = 0;
sc->sdifdv = dv;

/* Perform SD-card initialization. */
if( sdmmc_enable(sc) ) {
printf("Failed to enable SD interface\n");
errno = EIO;
return 0;
}
sc->busclk = sc->sdifdv->get_max_bus_clock(sc->sdifdv->priv);

if (sdmmc_scan(sc)) {
printf("No functions\n");
errno = EIO;
return 0;
}

if (sdmmc_select_card(sc)) {
printf("Failed to select card\n");
errno = EIO;
return 0;
}

if (!ISSET(sc->flags, SMF_CARD_SDHC)) {
sdmmc_mem_set_blocklen(sc);
}

/* change bus width if supported */
if (ISSET(sc->flags, SMF_SD_MODE) ) {
error = sdmmc_mem_send_scr(sc, sc->raw_scr);
if (error) {
DPRINTF(("SD_SEND_SCR send failed.\n"));
errno = EIO;
return 0;
}
error = sdmmc_mem_decode_scr(sc);
if (error) {
errno = EIO;
return 0;
}

if (ISSET(sc->caps, SMC_CAPS_4BIT_MODE) &&
ISSET(sc->scr.bus_width, SCR_SD_BUS_WIDTHS_4BIT)) {
error = sdmmc_set_bus_width(sc, 4);
if (error) {
DPRINTF(("can't change bus width"
" (%d bit)\n", 4));
errno = EIO;
return 0;
}
}

#if 1
if (sc->scr.sd_spec >= SCR_SD_SPEC_VER_1_10 &&
ISSET(sc->csd.ccc, SD_CSD_CCC_SWITCH)) {
DPRINTF(("switch func mode 0\n"));
error = sdmmc_mem_sd_switch(sc, 0, 1, 0, status);
if (error) {
printf("switch func mode 0 failed\n");
errno = error;
return 0;
}
}
#endif
sc->sdifdv->bus_clock(sc->sdifdv->priv, sc->busclk);
}

/* Prepare dummy partition[0] entry used by sdmmc_getdisklabel() */
sc->partitions[0].sc = sc;
sc->partitions[0].part->p_offset = 0;

if(sdmmc_getdisklabel(sc)) {
errno = EOFFSET;
return 0;
}

sc->npartitions = sc->sc_label.d_npartitions;
for(n=0; n<sc->sc_label.d_npartitions; n++) {
sc->partitions[n].part = &sc->sc_label.d_partitions[n];
sc->partitions[n].sc = sc;
}

sdmmc_initialized = TRUE;

return 1;
}

int
sdmmc_enable(struct sdmmc_softc *sc)
{
uint32_t card_ocr;
uint32_t ocr = 0;
uint32_t host_ocr;
int error;

/* 1. Set the maximum power supported by bus */
/* For now, we expect the init function to set the maximum
voltage. And if that is not supported by the SD-card we
just cannot work with it.
*/

sc->busclk = 400;
/* 2. Clock bus at minimum frequency */
sc->sdifdv->bus_clock(sc->sdifdv->priv, 400);

/* We expect that the above call has performed any waiting needed.*/

/* Initialize SD/MMC memory card(s), which is the only thing
we support.
*/

/* Set host mode to SD "combo" card or SD memory-only. */
SET(sc->flags, SMF_SD_MODE|SMF_MEM_MODE);

sdmmc_go_idle_state(sc);

error = sdmmc_mem_send_if_cond(sc, 0x1aa, &card_ocr);
if (error == 0 && card_ocr == 0x1aa)
SET(ocr, MMC_OCR_HCS);

/*
* Read the SD/MMC memory OCR value by issuing CMD55 followed
* by ACMD41 to read the OCR value from memory-only SD cards.
* MMC cards will not respond to CMD55 or ACMD41 and this is
* how we distinguish them from SD cards.
*/
mmc_mode:
error = sdmmc_mem_send_op_cond(sc,
ISSET(sc->caps, SMC_CAPS_SPI_MODE) ? ocr : 0, &card_ocr);
if (error) {
if (ISSET(sc->flags, SMF_SD_MODE) &&
!ISSET(sc->flags, SMF_IO_MODE)) {
/* Not a SD card, switch to MMC mode. */
DPRINTF(("Switch to MMC mode\n"));
CLR(sc->flags, SMF_SD_MODE);
goto mmc_mode;
}
if (!ISSET(sc->flags, SMF_SD_MODE)) {
DPRINTF(("couldn't read memory OCR\n"));
goto out;
} else {
/* Not a "combo" card. */
CLR(sc->flags, SMF_MEM_MODE);
error = 0;
goto out;
}
}
#if 0 /* SPI NOT SUPPORTED */
if (ISSET(ssc->caps, SMC_CAPS_SPI_MODE)) {
/* get card OCR */
error = sdmmc_mem_spi_read_ocr(sc, ocr, &card_ocr);
if (error) {
DPRINTF(("%s: couldn't read SPI memory OCR\n",
SDMMCDEVNAME(sc)));
goto out;
}
}
#endif

/* Set the lowest voltage supported by the card and host. */
host_ocr = sc->sdifdv->host_ocr(sc->sdifdv->priv);
error = sdmmc_set_bus_power(sc, host_ocr, card_ocr);
if (error) {
DPRINTF(("Couldn't supply voltage requested by card\n"));
goto out;
}
host_ocr &= card_ocr;
host_ocr |= ocr;

/* Send the new OCR value until all cards are ready. */
error = sdmmc_mem_send_op_cond(sc, host_ocr, NULL);
if (error) {
DPRINTF(("Couldn't send memory OCR\n"));
goto out;
}

out:
return error;
}

int
sdmmc_mem_send_if_cond(struct sdmmc_softc *sc, uint32_t ocr, uint32_t *ocrp)
{
struct sdmmc_command cmd;
int error;

memset(&cmd, 0, sizeof(cmd));
cmd.c_arg = ocr;
cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R7 | SCF_RSP_SPI_R7;
cmd.c_opcode = SD_SEND_IF_COND;

error = sdmmc_mmc_command(sc, &cmd);
if (error == 0 && ocrp != NULL) {
*ocrp = MMC_R7(cmd.c_resp);
}

return error;
}

void
sdmmc_go_idle_state(struct sdmmc_softc *sc)
{
struct sdmmc_command cmd;

memset(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_GO_IDLE_STATE;
cmd.c_flags = SCF_CMD_BC | SCF_RSP_R0 | SCF_RSP_SPI_R1;

(void)sdmmc_mmc_command(sc, &cmd);
}
int
sdmmc_mem_send_op_cond(struct sdmmc_softc *sc, uint32_t ocr, uint32_t *ocrp)
{
struct sdmmc_command cmd;
int error;
int retry;

/*
* If we change the OCR value, retry the command until the OCR
* we receive in response has the "CARD BUSY" bit set, meaning
* that all cards are ready for identification.
*/
for (retry = 0; retry < 100; retry++) {
memset(&cmd, 0, sizeof(cmd));
cmd.c_arg = !ISSET(sc->caps, SMC_CAPS_SPI_MODE) ?
ocr : (ocr & MMC_OCR_HCS);
cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R3 | SCF_RSP_SPI_R1;

if (ISSET(sc->flags, SMF_SD_MODE)) {
cmd.c_opcode = SD_APP_OP_COND;
error = sdmmc_app_command(sc, 0, &cmd);
} else {
cmd.c_opcode = MMC_SEND_OP_COND;
error = sdmmc_mmc_command(sc, &cmd);
}
if (error)
break;

if (ISSET(sc->caps, SMC_CAPS_SPI_MODE)) {
if (!ISSET(MMC_SPI_R1(cmd.c_resp), R1_SPI_IDLE))
break;
} else {
if (ISSET(MMC_R3(cmd.c_resp), MMC_OCR_MEM_READY) ||
ocr == 0)
break;
}

error = ETIMEDOUT;
sdmmc_delay(10000);
}
if (error == 0 &&
ocrp != NULL &&
!ISSET(sc->caps, SMC_CAPS_SPI_MODE))
*ocrp = MMC_R3(cmd.c_resp);
DPRINTF(("sdmmc_mem_send_op_cond: error=%d, ocr=%x\n",
error, MMC_R3(cmd.c_resp)));
return error;
}

/*
* Set the lowest bus voltage supported by the card and the host.
*/
int
sdmmc_set_bus_power(struct sdmmc_softc *sc, uint32_t host_ocr,
uint32_t card_ocr)
{
uint32_t bit;

/* Mask off unsupported voltage levels and select the lowest. */
DPRINTF(("host_ocr=%x ", host_ocr));
host_ocr &= card_ocr;
for (bit = 4; bit < 23; bit++) {
if (ISSET(host_ocr, (1 << bit))) {
host_ocr &= (3 << bit);
break;
}
}
DPRINTF(("card_ocr=%x new_ocr=%x\n", card_ocr, host_ocr));

if (host_ocr == 0 ||
sc->sdifdv->bus_power(sc->sdifdv->priv, host_ocr) != 0)
return 1;
return 0;
}

int
sdmmc_app_command(struct sdmmc_softc *sc, uint16_t rca,
struct sdmmc_command *cmd)
{
struct sdmmc_command acmd;
int error;

memset(&acmd, 0, sizeof(acmd));
acmd.c_opcode = MMC_APP_CMD;
if (rca != 0) {
acmd.c_arg = rca << 16;
acmd.c_flags = SCF_CMD_AC | SCF_RSP_R1 | SCF_RSP_SPI_R1;
} else {
acmd.c_arg = 0;
acmd.c_flags = SCF_CMD_BCR | SCF_RSP_R1 | SCF_RSP_SPI_R1;
}

error = sdmmc_mmc_command(sc, &acmd);
if (error == 0) {
if (!ISSET(sc->caps, SMC_CAPS_SPI_MODE) &&
!ISSET(MMC_R1(acmd.c_resp), MMC_R1_APP_CMD)) {
/* Card does not support application commands. */
error = ENODEV;
} else {
error = sdmmc_mmc_command(sc, cmd);
}
}
DPRINTF(("sdmmc_app_command: done (error=%d)\n", error));
return error;
}

void
sdmmc_dump_command(struct sdmmc_softc *sc, struct sdmmc_command *cmd)
{
int i;

printf("cmd %u arg=%x data=%p dlen=%d flags=%x (error %d)\n",
cmd->c_opcode, cmd->c_arg, cmd->c_data,
cmd->c_datalen, cmd->c_flags, cmd->c_error);

if (cmd->c_error )
return;

printf("resp=");
if (ISSET(cmd->c_flags, SCF_RSP_136))
for (i = 0; i < sizeof cmd->c_resp; i++)
printf("%02x ", ((uint8_t *)cmd->c_resp)[i]);
else if (ISSET(cmd->c_flags, SCF_RSP_PRESENT))
for (i = 0; i < 4; i++)
printf("%02x ", ((uint8_t *)cmd->c_resp)[i]);
else
printf("none");
printf("\n");
}

int
sdmmc_mmc_command(struct sdmmc_softc *sc, struct sdmmc_command *cmd)
{
int error;

DPRINTF(("sdmmc_mmc_command: cmd=%d, arg=%x, flags=%x\n",
cmd->c_opcode, cmd->c_arg, cmd->c_flags));

#if 0
#if defined(DIAGNOSTIC) || defined(SDMMC_DEBUG)
if (cmd->c_data && !ISSET(sc->caps, SMC_CAPS_SPI_MODE)) {
if (sc->sc_card == NULL)
panic("%s: deselected card\n", DEVNAME(sc));
}
#endif
#endif

sc->sdifdv->exec_cmd(sc->sdifdv->priv, cmd);

#ifdef SDMMC_DEBUG

sdmmc_dump_command(sc, cmd);

#endif

error = cmd->c_error;

DPRINTF(("sdmmc_mmc_command: error=%d\n", error));

return error;
}

/*
* Scan for I/O functions and memory cards on the bus, allocating a
* sdmmc_function structure for each.
*/
int
sdmmc_scan(struct sdmmc_softc *sc)
{

#if 0 /* SPI NOT SUPPORTED */
if (!ISSET(sc->caps, SMC_CAPS_SPI_MODE)) {
/* Scan for I/O functions. */
if (ISSET(sc->sc_flags, SMF_IO_MODE))
sdmmc_io_scan(sc);
}
#endif

/* Scan for memory cards on the bus. */
if (ISSET(sc->flags, SMF_MEM_MODE))
sdmmc_mem_scan(sc);

DPRINTF(("Bus clock speed: %d\n", sc->busclk));
return sc->sdifdv->bus_clock(sc->sdifdv->priv, sc->busclk);
}

/*
* Read the CSD and CID from all cards and assign each card a unique
* relative card address (RCA). CMD2 is ignored by SDIO-only cards.
*/
void
sdmmc_mem_scan(struct sdmmc_softc *sc)
{
sdmmc_response resp;
//struct sdmmc_function *sf;
// uint16_t next_rca;
int error;
int retry;

/*
* CMD2 is a broadcast command understood by SD cards and MMC
* cards. All cards begin to respond to the command, but back
* off if another card drives the CMD line to a different level.
* Only one card will get its entire response through. That
* card remains silent once it has been assigned a RCA.
*/
for (retry = 0; retry < 100; retry++) {
error = sdmmc_mem_send_cid(sc, &resp);
if (error) {
if (!ISSET(sc->caps, SMC_CAPS_SPI_MODE) &&
error == ETIMEDOUT) {
/* No more cards there. */
break;
}
DPRINTF(("Couldn't read CID\n"));
break;
}

/* In MMC mode, find the next available RCA. */
/*next_rca = 1;
if (!ISSET(dv->flags, SMF_SD_MODE)) {
SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list)
next_rca++;
}*/

/* Allocate a sdmmc_function structure. */
/*sf = sdmmc_function_alloc(sc);
sf->rca = next_rca;*/

/*
* Remember the CID returned in the CMD2 response for
* later decoding.
*/
memcpy(sc->raw_cid, resp, sizeof(sc->raw_cid));

/*
* Silence the card by assigning it a unique RCA, or
* querying it for its RCA in the case of SD.
*/
if (!ISSET(sc->caps, SMC_CAPS_SPI_MODE)) {
if (sdmmc_set_relative_addr(sc) != 0) {
DPRINTF(("couldn't set mem RCA\n"));
break;
}
}

/*
* If this is a memory-only card, the card responding
* first becomes an alias for SDIO function 0.
*/
/*if (sc->sc_fn0 == NULL)
sc->sc_fn0 = sf;

SIMPLEQ_INSERT_TAIL(&sc->sf_head, sf, sf_list);*/

/* only one function in SPI mode */
/*if (ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE))
break;*/
}

/*
* All cards are either inactive or awaiting further commands.
* Read the CSDs and decode the raw CID for each card.
*/
/* SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) {*/
error = sdmmc_mem_send_csd(sc, &resp);
if (error) {
/*SET(sf->flags, SFF_ERROR);
continue;*/
}

if (sdmmc_decode_csd(sc, resp) != 0 ||
sdmmc_decode_cid(sc, sc->raw_cid) != 0) {
/*SET(sf->flags, SFF_ERROR);
continue;*/
}

#ifdef SDMMC_DEBUG
printf("CID: ");
sdmmc_print_cid(&sc->cid);
#endif
/* }*/
}

/*
* Retrieve (SD) or set (MMC) the relative card address (RCA).
*/
int
sdmmc_set_relative_addr(struct sdmmc_softc *sc)
{
struct sdmmc_command cmd;
int error;

/* Don't lock */

if (ISSET(sc->caps, SMC_CAPS_SPI_MODE))
return EIO;

memset(&cmd, 0, sizeof(cmd));
if (ISSET(sc->flags, SMF_SD_MODE)) {
cmd.c_opcode = SD_SEND_RELATIVE_ADDR;
cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R6;
} else {
cmd.c_opcode = MMC_SET_RELATIVE_ADDR;
cmd.c_arg = MMC_ARG_RCA(sc->rca);
cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1;
}
error = sdmmc_mmc_command(sc, &cmd);
if (error)
return error;

if (ISSET(sc->flags, SMF_SD_MODE))
sc->rca = SD_R6_RCA(cmd.c_resp);

return 0;
}

int
sdmmc_mem_send_cid(struct sdmmc_softc *sc, sdmmc_response *resp)
{
struct sdmmc_command cmd;
int error;

memset(&cmd, 0, sizeof cmd);
cmd.c_opcode = MMC_ALL_SEND_CID;
cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R2;

error = sdmmc_mmc_command(sc, &cmd);

#ifdef SDMMC_DEBUG
sdmmc_dump_data("CID", cmd.c_resp, sizeof(cmd.c_resp));
#endif
if (error == 0 && resp != NULL)
memcpy(resp, &cmd.c_resp, sizeof(*resp));
return error;
}

void
sdmmc_dump_data(const char *title, void *ptr, size_t size)
{
char buf[16];
uint8_t *p = ptr;
int i, j;

printf("sdmmc_dump_data: %s\n", title ? title : "");
printf("--------+--------------------------------------------------+------------------+\n");
printf("offset | +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +a +b +c +d +e +f | data |\n");
printf("--------+--------------------------------------------------+------------------+\n");
for (i = 0; i < (int)size; i++) {
if ((i % 16) == 0) {
printf("%08x| ", i);
} else if ((i % 16) == 8) {
printf(" ");
}

printf("%02x ", p[i]);
buf[i % 16] = p[i];

if ((i % 16) == 15) {
printf("| ");
for (j = 0; j < 16; j++) {
if (buf[j] >= 0x20 && buf[j] <= 0x7e) {
printf("%c", buf[j]);
} else {
printf(".");
}
}
printf(" |\n");
}
}
if ((i % 16) != 0) {
j = (i % 16);
for (; j < 16; j++) {
printf(" ");
if ((j % 16) == 8) {
printf(" ");
}
}

printf("| ");
for (j = 0; j < (i % 16); j++) {
if (buf[j] >= 0x20 && buf[j] <= 0x7e) {
printf("%c", buf[j]);
} else {
printf(".");
}
}
for (; j < 16; j++) {
printf(" ");
}
printf(" |\n");
}
printf("--------+--------------------------------------------------+------------------+\n");
}

int
sdmmc_mem_send_csd(struct sdmmc_softc *sc, sdmmc_response *resp)
{
struct sdmmc_command cmd;
int error;

memset(&cmd, 0, sizeof cmd);
cmd.c_opcode = MMC_SEND_CSD;
cmd.c_arg = MMC_ARG_RCA(sc->rca);
cmd.c_flags = SCF_CMD_AC | SCF_RSP_R2;

error = sdmmc_mmc_command(sc, &cmd);

#ifdef SDMMC_DEBUG
sdmmc_dump_data("CSD", cmd.c_resp, sizeof(cmd.c_resp));
#endif
if (error == 0 && resp != NULL)
memcpy(resp, &cmd.c_resp, sizeof(*resp));
return error;
}

int
sdmmc_decode_csd(struct sdmmc_softc *sc, sdmmc_response resp)
{
/* TRAN_SPEED(2:0): transfer rate exponent */
static const int speed_exponent[8] = {
100 * 1, /* 100 Kbits/s */
1 * 1000, /* 1 Mbits/s */
10 * 1000, /* 10 Mbits/s */
100 * 1000, /* 100 Mbits/s */
0,
0,
0,
0,
};
/* TRAN_SPEED(6:3): time mantissa */
static const int speed_mantissa[16] = {
0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80,
};
struct sdmmc_csd *csd = &sc->csd;
int e, m;

if (ISSET(sc->flags, SMF_SD_MODE)) {
/*
* CSD version 1.0 corresponds to SD system
* specification version 1.0 - 1.10. (SanDisk, 3.5.3)
*/
csd->csdver = SD_CSD_CSDVER(resp);
switch (csd->csdver) {
case SD_CSD_CSDVER_2_0:
DPRINTF(("SD Ver.2.0\n"));
SET(sc->flags, SMF_CARD_SDHC);
csd->capacity = SD_CSD_V2_CAPACITY(resp);
csd->read_bl_len = SD_CSD_V2_BL_LEN;
csd->ccc = SD_CSD_CCC(resp);
break;

case SD_CSD_CSDVER_1_0:
DPRINTF(("SD Ver.1.0\n"));
csd->capacity = SD_CSD_CAPACITY(resp);
csd->read_bl_len = SD_CSD_READ_BL_LEN(resp);
break;

default:
printf("unknown SD CSD structure version 0x%x\n",
csd->csdver);
return 1;
}

csd->mmcver = SD_CSD_MMCVER(resp);
csd->write_bl_len = SD_CSD_WRITE_BL_LEN(resp);
csd->r2w_factor = SD_CSD_R2W_FACTOR(resp);
e = SD_CSD_SPEED_EXP(resp);
m = SD_CSD_SPEED_MANT(resp);
csd->tran_speed = speed_exponent[e] * speed_mantissa[m] / 10;
} else {
csd->csdver = MMC_CSD_CSDVER(resp);
if (csd->csdver == MMC_CSD_CSDVER_1_0 ) {
printf("unknown MMC CSD structure version 0x%x\n",
csd->csdver);
return 1;
}

csd->mmcver = MMC_CSD_MMCVER(resp);
csd->capacity = MMC_CSD_CAPACITY(resp);
csd->read_bl_len = MMC_CSD_READ_BL_LEN(resp);
csd->write_bl_len = MMC_CSD_WRITE_BL_LEN(resp);
csd->r2w_factor = MMC_CSD_R2W_FACTOR(resp);
e = MMC_CSD_TRAN_SPEED_EXP(resp);
m = MMC_CSD_TRAN_SPEED_MANT(resp);
csd->tran_speed = speed_exponent[e] * speed_mantissa[m] / 10;
}
if ((1 << csd->read_bl_len) > SDMMC_SECTOR_SIZE)
csd->capacity *= (1 << csd->read_bl_len) / SDMMC_SECTOR_SIZE;

if (sc->busclk > csd->tran_speed)
sc->busclk = csd->tran_speed;

#ifdef SDMMC_DUMP_CSD
sdmmc_print_csd(resp, csd);
#endif

return 0;
}

int
sdmmc_decode_cid(struct sdmmc_softc *sc, sdmmc_response resp)
{
struct sdmmc_cid *cid = &sc->cid;

if (ISSET(sc->flags, SMF_SD_MODE)) {
cid->mid = SD_CID_MID(resp);
cid->oid = SD_CID_OID(resp);
SD_CID_PNM_CPY(resp, cid->pnm);
cid->rev = SD_CID_REV(resp);
cid->psn = SD_CID_PSN(resp);
cid->mdt = SD_CID_MDT(resp);
} else {
switch(sc->csd.mmcver) {
case MMC_CSD_MMCVER_1_0:
case MMC_CSD_MMCVER_1_4:
cid->mid = MMC_CID_MID_V1(resp);
MMC_CID_PNM_V1_CPY(resp, cid->pnm);
cid->rev = MMC_CID_REV_V1(resp);
cid->psn = MMC_CID_PSN_V1(resp);
cid->mdt = MMC_CID_MDT_V1(resp);
break;
case MMC_CSD_MMCVER_2_0:
case MMC_CSD_MMCVER_3_1:
case MMC_CSD_MMCVER_4_0:
cid->mid = MMC_CID_MID_V2(resp);
cid->oid = MMC_CID_OID_V2(resp);
MMC_CID_PNM_V2_CPY(resp, cid->pnm);
cid->psn = MMC_CID_PSN_V2(resp);
break;
default:
printf("unknown MMC version %d\n",
sc->csd.mmcver);
return 1;
}
}
return 0;
}

void
sdmmc_print_cid(struct sdmmc_cid *cid)
{

printf("mid=0x%02x oid=0x%04x pnm=\"%s\" rev=0x%02x psn=0x%08x"
" mdt=%03x\n", cid->mid, cid->oid, cid->pnm, cid->rev, cid->psn,
cid->mdt);
}

int
sdmmc_mem_read_block(struct sdmmc_softc *sc, uint32_t blkno,
u_char *data, size_t datalen)
{
struct sdmmc_command cmd;
int error;

memset(&cmd, 0, sizeof(cmd));
cmd.c_data = data;
cmd.c_datalen = datalen;
cmd.c_blklen = SDMMC_SECTOR_SIZE;
cmd.c_opcode = (cmd.c_datalen / cmd.c_blklen) > 1 ?
MMC_READ_BLOCK_MULTIPLE : MMC_READ_BLOCK_SINGLE;
cmd.c_arg = blkno;
if (!ISSET(sc->flags, SMF_CARD_SDHC))
cmd.c_arg <<= SDMMC_SECTOR_SIZE_SB;
DPRINTF(("Reading block %d (%d)\n", blkno, cmd.c_arg));
cmd.c_flags = SCF_CMD_ADTC | SCF_CMD_READ | SCF_RSP_R1 | SCF_RSP_SPI_R1;

error = sdmmc_mmc_command(sc, &cmd);
if (error)
goto out;

if (!ISSET(sc->caps, SMC_CAPS_AUTO_STOP)) {
if (cmd.c_opcode == MMC_READ_BLOCK_MULTIPLE) {
memset(&cmd, 0, sizeof cmd);
cmd.c_opcode = MMC_STOP_TRANSMISSION;
cmd.c_arg = MMC_ARG_RCA(sc->rca);
cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1B | SCF_RSP_SPI_R1B;
error = sdmmc_mmc_command(sc, &cmd);
if (error)
goto out;
}
}

/*if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) {*/
do {
memset(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_SEND_STATUS;
cmd.c_arg = MMC_ARG_RCA(sc->rca);
cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1 | SCF_RSP_SPI_R2;
error = sdmmc_mmc_command(sc, &cmd);
if (error)
break;
/* XXX time out */
} while (!ISSET(MMC_R1(cmd.c_resp), MMC_R1_READY_FOR_DATA));
/*}*/

out:
return error;
}

int
sdmmc_select_card(struct sdmmc_softc *sc)
{
struct sdmmc_command cmd;
int error;

/* Don't lock */

/* if (ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE))
return EIO;*/

/*if (sc->sc_card == sf
|| (sf && sc->sc_card && sc->sc_card->rca == sf->rca)) {
sc->sc_card = sf;
return 0;
}*/

memset(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_SELECT_CARD;
cmd.c_arg = (sc == NULL) ? 0 : MMC_ARG_RCA(sc->rca);
cmd.c_flags = SCF_CMD_AC | ((sc == NULL) ? SCF_RSP_R0 : SCF_RSP_R1);
error = sdmmc_mmc_command(sc, &cmd);
/*if (error == 0 || sf == NULL)
sc->sc_card = sf;*/

return error;
}

/*
* Set the read block length appropriately for this card, according to
* the card CSD register value.
*/
int
sdmmc_mem_set_blocklen(struct sdmmc_softc *sc)
{
struct sdmmc_command cmd;
int error;

/* Don't lock */

memset(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_SET_BLOCKLEN;
cmd.c_arg = SDMMC_SECTOR_SIZE;
cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1 | SCF_RSP_SPI_R1;

error = sdmmc_mmc_command(sc, &cmd);

DPRINTF(("sdmmc_mem_set_blocklen: read_bl_len=%d sector_size=%d\n",
1 << sc->csd.read_bl_len, SDMMC_SECTOR_SIZE));

return error;
}

int
sdmmc_mem_send_scr(struct sdmmc_softc *sc, uint32_t scr[2])
{
struct sdmmc_command cmd;
void *ptr = NULL;
int datalen = 8;
int error = 0;

ptr = alloc(datalen); //malloc(datalen, M_DEVBUF, M_NOWAIT | M_ZERO);
if (ptr == NULL)
goto out;

memset(&cmd, 0, sizeof(cmd));
cmd.c_data = ptr;
cmd.c_datalen = datalen;
cmd.c_blklen = datalen;
cmd.c_arg = 0;
cmd.c_flags = SCF_CMD_ADTC | SCF_CMD_READ | SCF_RSP_R1 | SCF_RSP_SPI_R1;
cmd.c_opcode = SD_APP_SEND_SCR;

error = sdmmc_app_command(sc, sc->rca, &cmd);
if (error == 0) {
memcpy(scr, ptr, datalen);
}

out:
if (ptr != NULL) {
dealloc(ptr, datalen);
}
DPRINTF(("sdmem_mem_send_scr: error = %d\n",
error));
if (error)
return error;
#ifdef SDMMC_DEBUG
sdmmc_dump_data("SCR", scr, 8);
#endif
return error;
}

int
sdmmc_mem_decode_scr(struct sdmmc_softc *sc)
{
sdmmc_response resp;
int ver;

memset(resp, 0, sizeof(resp));
/*resp[0] = sc->raw_scr[1];
resp[1] = sc->raw_scr[0];*/
/*
* Change the raw-scr received from the DMA stream to resp.
*/
resp[0] = be32toh(sc->raw_scr[1]) >> 8; // LSW
resp[1] = be32toh(sc->raw_scr[0]); // MSW
resp[0] |= (resp[1] & 0xff) << 24;
resp[1] >>= 8;
resp[0] = htole32(resp[0]);
resp[1] = htole32(resp[1]);

ver = SCR_STRUCTURE(resp);
sc->scr.sd_spec = SCR_SD_SPEC(resp);
sc->scr.bus_width = SCR_SD_BUS_WIDTHS(resp);

DPRINTF(("sdmmc_mem_decode_scr: spec=%d, bus width=%d\n",
sc->scr.sd_spec, sc->scr.bus_width));

if (ver != 0) {
DPRINTF(("unknown structure version: %d\n",
ver));
return EINVAL;
}
return 0;
}

int
sdmmc_set_bus_width(struct sdmmc_softc *sc, int width)
{
struct sdmmc_command cmd;
int error;

if (ISSET(sc->caps, SMC_CAPS_SPI_MODE))
return ENODEV;

memset(&cmd, 0, sizeof(cmd));
cmd.c_opcode = SD_APP_SET_BUS_WIDTH;
cmd.c_flags = SCF_RSP_R1 | SCF_CMD_AC;

switch (width) {
case 1:
cmd.c_arg = SD_ARG_BUS_WIDTH_1;
break;

case 4:
cmd.c_arg = SD_ARG_BUS_WIDTH_4;
break;

default:
return EINVAL;
}

error = sdmmc_app_command(sc, sc->rca, &cmd);
if (error == 0)
error = sc->sdifdv->bus_width(sc->sdifdv->priv, width);
return error;
}

#if 1
static int
sdmmc_mem_sd_switch(struct sdmmc_softc *sc, int mode, int group,
int function, void *status)
{
struct sdmmc_command cmd;
void *ptr = NULL;
int gsft, error = 0;
const int statlen = 64;

if (sc->scr.sd_spec >= SCR_SD_SPEC_VER_1_10 &&
!ISSET(sc->csd.ccc, SD_CSD_CCC_SWITCH))
return EINVAL;

if (group <= 0 || group > 6 ||
function < 0 || function > 16)
return EINVAL;

gsft = (group - 1) << 2;

ptr = alloc(statlen);
if (ptr == NULL)
goto out;

memset(&cmd, 0, sizeof(cmd));
cmd.c_data = ptr;
cmd.c_datalen = statlen;
cmd.c_blklen = statlen;
cmd.c_opcode = SD_SEND_SWITCH_FUNC;
cmd.c_arg =
(!!mode << 31) | (function << gsft) | (0x00ffffff & ~(0xf << gsft));
cmd.c_flags = SCF_CMD_ADTC | SCF_CMD_READ | SCF_RSP_R1 | SCF_RSP_SPI_R1;

error = sdmmc_mmc_command(sc, &cmd);
if (error == 0) {
memcpy(status, ptr, statlen);
}

out:
if (ptr != NULL) {
dealloc(ptr, statlen);
}
return error;
}
#endif